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Efgartigimod

Cat. No. M31365
Efgartigimod Structure
Synonym:

ARGX-113

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Quality Control & Documentation
Biological Activity

Efgartigimod (ARGX-113) is a human IgG1 antibody Fc-derived fragment and an Fc receptor antagonist that can be used in studies related to autoimmune diseases such as myasthenia gravis (MG), primary immune thrombocytopenia (ITP), and others.

Chemical Information
Storage Powder          -20°C   3 years ;  4°C   2 years
In solvent       -80°C   6 months ;  -20°C   1 month
Conversion of different model animals based on BSA (PMID: 27057123)
Species Mouse Rat Rabbit Guinea pig Hamster Dog
Weight (kg) 0.02 0.15 1.8 0.4 0.08 10
Body Surface Area (m2) 0.007 0.025 0.15 0.05 0.02 0.5
Km factor 3 6 12 8 5 20
Animal A (mg/kg) = Animal B (mg/kg) multiplied by  Animal B Km
Animal A Km

For example, to modify the dose of Compound A used for a mouse (20 mg/kg) to a dose based on the BSA for a rat, multiply 20 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for Compound A of 10 mg/kg.

References

[1] No authors listed. Efgartigimod Alfa

[2] Shigeaki Suzuki, et al. Expert Rev Clin Immunol. Efgartigimod for generalized myasthenia gravis with or without anti-acetylcholine receptor antibodies: a worldwide and Japanese perspective

[3] Young-A Heo. Drugs. Efgartigimod: First Approval

[4] James F Howard Jr, et al. Lancet Neurol. Safety, efficacy, and tolerability of efgartigimod in patients with generalised myasthenia gravis (ADAPT): a multicentre, randomised, placebo-controlled, phase 3 trial

[5] James F Howard Jr, et al. Neurology. Randomized phase 2 study of FcRn antagonist efgartigimod in generalized myasthenia gravis

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